package com.yundin.controller.user;
import com.yundin.constant.StatusConstant;
import com.yundin.entity.Dish;
import com.yundin.result.Result;
import com.yundin.service.DishService;
import com.yundin.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;


/**
 * 根据分类id查询菜品
 *
 * @param categoryId
 * @return
 */
@GetMapping("/list")
@ApiOperation("根据分类id查询菜品")
public Result<List<DishVO>> list(Long categoryId) {
     //构造redis中的key，规则：dish_分类id
    String key = "dish_" + categoryId;
       //查询redis中是否存在菜品数据
    List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
    if(list != null && list.size() > 0){
        //如果存在，直接返回，无须查询数据库
        return Result.success(list);
    }

    Dish dish = new Dish();
    dish.setCategoryId(categoryId);
    dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品
    //如果不存在，查询数据库，将查询到的数据放入redis中
    list = dishService.listWithFlavor(dish);

    redisTemplate.opsForValue().set(key, list);
    return Result.success(list);
}
}